Apparatus for recording a color image on a color photogaphic material based on three color component image signals separated from the color image

Abstract

An image recording apparatus of the present invention comprises: an image processing means for compensating the color and gradation of an inputted color image; a monochromatic CRT; a display means for successively inputting color images, having a plurality of colors, into the monochromatic CRT, and for displaying a plurality of images on the monochromatic CRT as monochromatic images; an optical system for forming the monochromatic image, displayed on the monochromatic CRT, onto a color photographic paper; a plurality of color filters, which are selectively inserted between the monochromatic CRT and the color photographic paper, and convert the monochromatic image into a plurality of monochromatic color images; an exposure luminance setting means for each separation color; and an emitting luminance control means.

What is claimed is: 
     
       1. An apparatus for recording a color image on a color photographic material based on three color component image signals separated from the color image, comprising: a black-and-white cathode ray tube for separately and sequentially receiving the three color component image signals and for sequentially emitting a black-and-white image for each of the three color component image signals from a screen;   three color filters, selectively inserted in an optical path between the cathode ray tube and the color photographic material, for converting the black-and-white image into a corresponding monochromatic image for each of the three color component image signals so that the color photographic material is sequentially exposed with three monochromatic images through the optical path in order to record the color image on the color photographic material;   a memory for storing color a reference luminance of each color component corresponding to said three color component image signals;   a detector for detecting a luminance of the light through the respective said color filter for each color component; and   luminance control means for comparing the detected luminance with the reference luminance for each color component to obtain a comparison result, and controlling a luminance level of each of the three color component image signals based on the comparison result of each color component so as to control emission of light from the cathode ray tube for each color component based on the reference luminance of each color component.   
     
     
       2. The apparatus of claim 1, wherein the three color components are blue, green and red. 
     
     
       3. The apparatus of claim 1, wherein the cathode ray tube includes a screen which is coated with phosphor in which an amount of phosphor type P45 and phosphor type P22 defined by Electronic Industries Association are mixed with the following ratio:   0.67<P45/P22<1.5.     
     
     
       4. The apparatus of claim 1, wherein the reference luminance of the color components are determined in accordance with spectral sensitivities of the color photographic material so as to make an exposure time period for each color component equal to that of others. 
     
     
       5. The apparatus of claim 1, wherein the three color filters are used for detecting the luminance of the light for each color component. 
     
     
       6. The apparatus of claim 1, wherein the detector comprises three sensors, each sensor provided with a different color filter for detecting the luminance of the light for each color component. 
     
     
       7. The apparatus of claim 1, wherein the detector is arranged to detect the luminance of the light emitted from a central portion of the screen. 
     
     
       8. The apparatus of claim 1, further comprising a light shielding member capable of being inserted between the cathode ray tube and the color photographic material, wherein a plurality of sensors are placed in a two dimensional arrangement on the light shielding member so that luminance distribution on the cathode ray tube is measured by the plurality of sensors and the luminance distribution on the cathode ray tube is adjusted based on luminance measured by the plurality of sensors. 
     
     
       9. The apparatus of claim 8, wherein the three color filters and the light shielding member are driven by a common driving member. 
     
     
       10. The apparatus of claim 8, wherein the light shielding member is provided between the three color filters and the color photographic material. 
     
     
       11. The apparatus of claim 1, further comprising a rotatable disk on which the three color filters and a light shielding member are provided, wherein the three color filters and the light shielding member are selectively inserted in the optical path with rotation of the disk. 
     
     
       12. The apparatus of claim 11, wherein a color filter for detecting the luminance of light for each color component is provided on the disk in the vicinity of the light shielding member so that the luminance of the light for each color component is detected when the light shielding member shields the optical path. 
     
     
       13. The apparatus of claim 12, wherein the color filter for detecting the luminance has the same spectral characteristics as that of a corresponding one of the three color filters.